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Firefly III vs KMyMoney: catalog facts
Firefly III	KMyMoney
Free Free and open source under the AGPL 3.0. You provide the hosting.	Free Free and open source under the GPL.
Windows, macOS, Linux, Web, Self-hosted	Windows, macOS, Linux
Budgets, categories, tags, bills and recurring transactions in one place Rules that categorise transactions as they arrive	Double-entry accounting with proper investment and loan handling Online price quotes for securities
A PHP application with a database that you have to run and update Bank imports need a separate companion tool	Pulls in KDE libraries, which makes the Windows and macOS builds heavy
Self-hosted	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.